2-M2
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
TRANSMISSION
2. POWER TRAIN
[1] HYDROSTATIC TRANSMISSION (HST)
(1) Structure
The hydrostatic transmission (HST) consists of a variable displacement piston pump, a fixed displacement piston
motor, two check and high pressure relief valves and a charge relief valve.
The pump and motor have nine pistons in their cylinder blocks.
The discharge rate of the HST is 18.9 cm
3
/rev. (1.15 cu.in./rev.).
The speed control pedal permits simple operation of the machine, starting, stopping, increasing or decreasing
speed.
(1) Motor Shaft
(2) Needle Bearing
(3) Thrust Plate
(4) Charge Relief Valve
(5) Cylinder Block (Motor)
(6) Valve Plate
(7) Needle Bearing
(8) Oil Seal
(9) Needle Bearing
(10) Valve Plate
(11) Center Section
(12) Cylinder Block (Pump)
(13) Piston
(14) Retainer Plate
(15) Thrust Plate
(16) Variable Swashplate
(17) HST Housing
(18) Pump Shaft
(19) Valve Plug
(20) Check Valve Spring
(21) Relief Valve Spring
(22) Check and High Pressure
Relief Valve (Forward)
(23) Check and High Pressure
Relief Valve (Reverse)
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